What kind of celestial objects are found mostly between Mars and Jupiter?

The region between Mars and Jupiter is primarily known as the asteroid belt. This area is densely populated with a variety of rocky objects, which are what we classify as asteroids. These celestial bodies are remnants from the early solar system that never coalesced into a planet due to the gravitational influences of Jupiter nearby.

Asteroids vary in size, composition, and orbit, but they all share the characteristic of being small, rocky bodies orbiting the Sun. The presence of these asteroids in the belt indicates important insights into planetary formation and the history of the solar system.

The other categories, such as planets, comets, and meteors, refer to different types of celestial objects that occupy different regions or have different characteristics. For example, while planets have cleared their orbits of other debris, comets are typically found in the outer solar system and have distinct tails made of gas and dust when they come close to the Sun. Meteors, on the other hand, refer to the phenomenon we observe when a meteoroid enters the Earth's atmosphere and vaporizes. Thus, the concentration of asteroid objects in this specific part of space makes "B" the most accurate answer.